The snapshotting period is 3 months.
If you have 135,000 nxt the whole 3 months you will get 135,000 Ardor.
If you have the 135,000 nxt for 2 months you will get 2/3 of 135,000 Ardor and so on.
It is recommended not to hold your nxt on an exchange.
Ah this makes sense at the moment, I have my NXT on the exchange for now until the NXT wallet blockchain is finished, it is half way done right now and it just needs to complete.
In saying this does the snapshot of the exchanges work as well, and if I move it now in to a wallet on my PC how does that impact me because I am now going to be moving it on to a wallet and not being in the same address as it was?